Brake pedal is really stiff

As Far as the Drums go, there is a spec for the serviceability of the drum. The Max I.D. Is stamped on the Drum. The person resurfacing the drum should have checked it before and after. They sould only have taken of a tiny bit to De-glaze the Drum. Unless they were clueless and took way way too much meat off the drum, Then that's probably not your problem. Especially with new shoes to fill the void. Also, The design of the Shoes and Adjusters is such that the shoes will remain close to a perfect circle as the shoes wear. The shoes "slide" lightly as they wear keeping them "round" in side the drum. Check the drums with a Micrometer and tell us the measurement. If they are in spec or close to it then you should be able to get great stopping power. Also, You can jack up the car and have a helper step on the brakes and try to spin each wheel with the brakes applied. This will pinpoint a problem and point you to which wheel position has the problem. This is also the time to make final adjustments to the brakes. You keep adjusting and the helper keeps pumping the Brakes to center the shoes in the drum.